<?php
/**
 * Defines the editing form for the missingtype question type.
 *
 * @copyright &copy; 2007 Jamie Pratt
 * @author Jamie Pratt me@jamiep.org
 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
 * @package questionbank
 * @subpackage questiontypes
 */

/**
 * missingtype editing form definition.
 */
class question_edit_missingtype_form extends question_edit_form {
	/**
	 * Add question-type specific form fields.
	 *
	 * @param object $mform the form being built.
	 */
	function definition_inner(&$mform) {
		$creategrades = get_grade_options();
		$gradeoptions = $creategrades->gradeoptionsfull;
		$repeated = array();
		$repeated[] =& $mform->createElement('header', 'choicehdr', get_string('choiceno', 'qtype_multichoice', '{no}'));
		$repeated[] =& $mform->createElement('text', 'answer', get_string('answer', 'quiz'));
		$repeated[] =& $mform->createElement('select', 'fraction', get_string('grade'), $gradeoptions);
		$repeated[] =& $mform->createElement('htmleditor', 'feedback', get_string('feedback', 'quiz'),
								array('course' => $this->coursefilesid));

		if (isset($this->question->options)){
			$countanswers = count($this->question->options->answers);
		} else {
			$countanswers = 0;
		}
		if ($this->question->formoptions->repeatelements){
			$repeatsatstart = (QUESTION_NUMANS_START > ($countanswers + QUESTION_NUMANS_ADD))?
								QUESTION_NUMANS_START : ($countanswers + QUESTION_NUMANS_ADD);
		} else {
			$repeatsatstart = $countanswers;
		}
		$repeatedoptions = array();
		$repeatedoptions['fraction']['default'] = 0;
		$mform->setType('answer', PARAM_NOTAGS);
		$this->repeat_elements($repeated, $repeatsatstart, $repeatedoptions, 'noanswers', 'addanswers', QUESTION_NUMANS_ADD, get_string('addmorechoiceblanks', 'qtype_multichoice'));
	}

	function set_data($question) {
		if (isset($question->options)){
			$answers = $question->options->answers;
			if (count($answers)) {
				$key = 0;
				foreach ($answers as $answer){
					$default_values['answer['.$key.']'] = $answer->answer;
					$default_values['fraction['.$key.']'] = $answer->fraction;
					$default_values['feedback['.$key.']'] = $answer->feedback;
					$key++;
				}
			}
			$question = (object)((array)$question + $default_values);
		}
		parent::set_data($question);
	}

	function qtype() {
		return 'missingtype';
	}

	function validation($data, $files) {
		$errors = parent::validation($data, $files);
		$answers = $data['answer'];
		$answercount = 0;

		$totalfraction = 0;
		$maxfraction = -1;

		foreach ($answers as $key => $answer){
			//check no of choices
			$trimmedanswer = trim($answer);
			if (!empty($trimmedanswer)){
				$answercount++;
			}
			//check grades
			if ($answer != '') {
				if ($data['fraction'][$key] > 0) {
					$totalfraction += $data['fraction'][$key];
				}
				if ($data['fraction'][$key] > $maxfraction) {
					$maxfraction = $data['fraction'][$key];
				}
			}
		}

		if ($answercount==0){
			$errors['answer[0]'] = get_string('notenoughanswers', 'qtype_multichoice', 1);
		}


		$totalfraction = round($totalfraction, 2);
		if ($totalfraction != 1) {
			$totalfraction = $totalfraction * 100;
			$errors['fraction[0]'] = get_string('errfractionsaddwrong', 'qtype_multichoice', $totalfraction);
		}

		return $errors;
	}
}
?>